Integrate JUCE with C++ GA code

[Pocwiardo]

Genetic Algorithm code in C++ creates an object that takes generation parameters, and then it returns array of consecutive notes. We want this to be run from plugin. Ideally we would want to input values in the plugin, generate solutions and trigger the best solutions (from the final population) with specific MIDI notes.

• [x] create basic UI to input generation parameters.
• [x] add GA code to JUCE plugin template
• [x] present generated melody to the user (ideally playing it with some instrument, at worst print the array)

[Pocwiardo]

For GA Code, the whole mechanism is called from a file named GA_in_Cpp.cpp so it should probably called similarly from the JUCE plugin.